On some perspectives for increasing the efficiency of combined cycle power plants

Franco, Alessandro; Casarosa, Claudio

doi:10.1016/s1359-4311(02)00053-4

Cited by 93 publications

(35 citation statements)

References 9 publications

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“…At the load of 50%, the best efficiency of the combined cycle plant is 54.25%, 4.17% more than that of original value. To Alstom GT26 post-combustion gas turbine combined cycle, the combined cycle efficiency gets even higher (>60%) as Alessandro Franco has analyzed [6].…”

Section: Brayton Cycle With Partial Gas To Gas Recuperationmentioning

confidence: 99%

“…Optimization of heat recovery steam generator (HRSG) with the use of parallel sections and of limit subcritical conditions (up to 220 bar) is proposed in his another paper. The HRSG optimization is sufficient to obtain combined cycle plant efficiencies of the order of 60% while, joining HRSG optimization with the use of AlstomGT26 gas turbine reheat and gas to gas recuperation can lead the efficiency of the whole plant to the limit value of 65% [6].…”

Section: Introductionmentioning

confidence: 99%

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Performance improvement of combined cycle power plant based on the optimization of the bottom cycle and heat recuperation

Xiang

Chen

2007

J. of Therm. Sci.

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Many F class gas turbine combined cycle (GTCC) power plants are built in China at present because of less emission and high efficiency. It is of great interest to investigate the efficiency improvement of GTCC plant. A combined cycle with three-pressure reheat heat recovery steam generator (HRSG) is selected for study in this paper.In order to maximize the GTCC efficiency, the optimization of the HRSG operating parameters is performed. The operating parameters are determined by means of a thermodynamic analysis, i.e. the minimization of exergy losses. The influence of HRSG inlet gas temperature on the steam bottoming cycle efficiency is discussed. The result shows that increasing the HRSG inlet temperature has less improvement to steam cycle efficiency when it is over 590ºC. Partial gas to gas recuperation in the topping cycle is studied. Joining HRSG optimization with the use of gas to gas heat recuperation, the combined plant efficiency can rise up to 59.05% at base load. In addition, the part load performance of the GTCC power plant gets much better. The efficiency is increased by 2.11% at 75% load and by 4.17% at 50% load.

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Section: Brayton Cycle With Partial Gas To Gas Recuperationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance improvement of combined cycle power plant based on the optimization of the bottom cycle and heat recuperation

Xiang

Chen

2007

J. of Therm. Sci.

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“…Franco and Casarosa [3] and Franco and Russo [4] compared HRSG systems for one, two and three pressure levels with and without reheat and demonstrated that it is possible to reach an overall efficiency of 60% just by optimizing the steam cycle. Xiang and Chen [5] optimized a reheat three pressure levels HRSG both at a full and a part load, and suggested using a partial recovery of the exhaust gas energy for a temperature exceeding 590°C.…”

Section: Introductionmentioning

confidence: 99%

Thermo-economic optimization of heat recovery steam generator for a range of gas turbine exhaust temperatures

Nadir

Ghenaiet

Carcasci

2016

Applied Thermal Engineering

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“…The examined thermodynamic schemes were based on the combination of air cooling, intercooling, gas to gas recuperation and reheating [14][15][16][17][18][19][20]. For large-scale power generation, greater than 50 MW, it is proven that SBC is the most effective thermodynamic scheme than any other bottoming cycle [21][22][23]. However, for small-scale power gas turbines, generating less than 50 MW, suffering from limited efficiency, ABC can be competitive, thanks to size and economic constraints rendering unfavorable the use of SBC.…”

Section: Introductionmentioning

confidence: 99%

Air Bottoming Cycle for Hybrid Solar-Gas Power Plants

Khaldi

2011

Linköping Electronic Conference Proceedings

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Several solar-gas hybrid power plants based on the parabolic trough system are under construction in the MENA region and in Spain. The thermodynamic cycle of these plants is divided into topping cycle and bottoming cycle according to their temperature range. Since the solar collectors supply heat at a medium temperature level, up to 400°C, the existing technology uses a steam bottoming cycle (steam turbine). The present study aimed at investigating the thermodynamic feasibility of using air bottoming cycle (gas turbine) instead of the steam bottoming cycle. A thermodynamic scheme of solar air bottoming cycle was proposed. The case study considered an existing small size capacity gas turbine (<50 MW) as a topping cycle. The thermodynamic performance of the proposed solar air bottoming cycle was compared to two reference cases, without solar energy, a steam bottoming cycle and a conventional air bottoming cycle.

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On some perspectives for increasing the efficiency of combined cycle power plants

Cited by 93 publications

References 9 publications

Performance improvement of combined cycle power plant based on the optimization of the bottom cycle and heat recuperation

Performance improvement of combined cycle power plant based on the optimization of the bottom cycle and heat recuperation

Thermo-economic optimization of heat recovery steam generator for a range of gas turbine exhaust temperatures

Air Bottoming Cycle for Hybrid Solar-Gas Power Plants

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